The price of a non-dividend-paying stock is $19 and the price of a 3-month European call option on the stock with a strike price of $20 is $1. The risk-free rate is 4% pa. The price of a 3-month European put option with a strike price of $20 is $1.80. Suppose the put price in the market is 1.72. How would you take advantage of the arbitrage opportunity and what is the arbitrage profit?